CVE-2026-103299— nexi Alpha Bank for WooCommerce <= 2.2.0 - Unauthenticated Payment Confirmation Forgery via Empty Shared Secret

Quick assessment

Affected

Unknown Payment Gateway

Exploitation

No confirmed in-the-wild exploitation; assess based on exposure

Recommended action

Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Payment Gateway WordPress 插件（版本 2.2.0 及以下）未在使用共享密钥对银行支付通知回调进行身份验证之前，确保该密钥已正确配置。这导致未认证的攻击者能够伪造有效的支付通知，从而在共享密钥未设置的环境中将任意 WooCommerce 订单标记为“已支付”。此外，该回调接口还允许攻击者将任意处于“待处理”状态的订单标记为“失败”，无论共享密钥是否已配置。

AI Predicted 9.8 Difficulty: Trivial Updated Oct 26, 2026

Possible ATT&CK Techniques 2 AI

T1573 · Encrypted Channel T1190 · Exploit Public-Facing Application

Updated Oct 26, 2026

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Vulnerability Information

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Vulnerability Title

nexi Alpha Bank for WooCommerce <= 2.2.0 - Unauthenticated Payment Confirmation Forgery via Empty Shared Secret

Source: CVE Program / CVE List V5

Vulnerability Description

The Payment Gateway WordPress plugin through 2.2.0 does not ensure a shared secret is configured before using it to authenticate the bank's payment-notification callback, allowing unauthenticated attackers to forge a valid notification and mark any WooCommerce order as paid on installs where the secret has not been set, and the same callback lets them move any pending order to a failed state whether or not the secret is configured.

Source: CVE Program / CVE List V5

CVSS Information

N/A

Source: CVE Program / CVE List V5

Vulnerability Type

N/A

Source: CVE Program / CVE List V5

Affected Products

Vendor	Product	Affected Versions	CPE	Subscribe
Unknown	Payment Gateway	0 ~ 2.2.0	-

II. Public POCs for CVE-2026-103299

#	POC Description	Source Link	Shenlong Link

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III. Intelligence Information for CVE-2026-103299

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Other References for CVE-2026-103299 (1)

https://wpscan.com/vulnerability/0a1c3070-181d-49ea-9488-d0d7e4be419c/ exploit vdb-entry technical-description

https://www.cve.org/CVERecord?id=CVE-2026-103299

Same Patch Batch · Unknown · 2026-10-26 · 7 CVEs total

CVE-2026-103300	5.3 MEDIUM	Eurobank WooCommerce Payment Gateway <= 2.1.1 - Unauthenticated Order Payment Forgery via
CVE-2026-111974	5.3 MEDIUM	GiveWP < 4.19.0.1 - Unauthenticated Donation Amount Restriction Bypass via Currency
CVE-2026-103319		OPay Payment Gateway for WooCommerce <= 2.5.5 - Unauthenticated Payment Confirmation Forge
CVE-2026-103381		Mintpay <= 2.2.3 - Unauthenticated Order Payment Completion and Cancellation via Callback
CVE-2026-103298		CCAvenue Payment Gateway for WooCommerce <= 3.1 - Unauthenticated Order Payment Completion
CVE-2026-103306		iKhokha Payment Gateway < 3.0.4 - Unauthenticated Order Payment Forgery via Callback

IV. Related Vulnerabilities

Same vendor: Unknown